You can use the terms "and" & "or" in your search; "or" phrases are resolved
first, then the "and" phrases. For example, searching for "black hole and
galaxy or universe" will find articles that have the phrase "black hole" in them
and also have either "galaxy" or "universe" in them. Please note that other
search syntax like quote marks, hyphens, etc. are not currently supported.

When you view web pages with matches to your search, the terms you searched for will be highlighted in yellow.

There’s a picture of Wayne Myrvold in Greenwich Village, New York, holding a concertina surrounded by hundreds of other ancient looking musical instruments. If you didn’t know him, you’d be forgiven for thinking the associate professor from the University of Western Ontario in London, Ontario, Canada, is a trained musician.

He’s not.

In fact, Myrvold is a philosopher of science and he has no idea how to play the concertina. But rather than take conventional music lessons, he enjoys the challenge of trying to figure out the instrument in his own way. Myrvold takes a similar approach to understanding quantum mechanics: He knows the standard answers from physicists, but he hopes that his own philosophical take will illuminate some of the theory’s famous peculiarities and will show that its spooky reputation is unwarranted.

"If someone tells me that quantum mechanics is weird, counterintuitive and strange, but you should just accept that we live in a strange counterintuitive quantum world, I’ll say okay but tell me what kind of world that is," Myrvold says.

In the weird quantum realm, subatomic particles can be in two places at once, or exist in multiple energy states, before anyone looks at them. The standard explanation is that before you observe it, a quantum object is described mathematically by a smeared out wavefunction, which tells you the probability of finding it in any one location, or energy state. When you make a measurement, that wavefunction "collapses" into one set location and energy level. Prior to that observation, however, you could not predict what the outcome of the measurement would be.

That’s the textbook answer. But, says Myrvold, even if you can wrap your head around wavefunction collapse, another quantum phenomenon—entanglement—makes everything problematic. Entangled particles are intertwined in such a way that measuring the properties of one seems to instantaneously affect the properties of its partners. Einstein famously denounced entanglement as "spooky action at a distance" because this communication appears to happen faster than the speed of light—violating the universe’s speed limit, set by his theory of relativity. This feature of quantum mechanics is called non-locality.

"To comply with relativity, you don’t want the possibility for faster than light signaling," explains FQXi-member Daniel Bedingham, a physicist who has also wrestled with wavefunction collapse, independently from Myrvold, at Imperial College London, UK.

Collapsing Misconceptions

Myrvold, however, believes that any seeming violation of relativity is an illusion. He argues that if we throw out one of our pre-20th century misconceptions, we’ll understand that there’s nothing spooky going on at all. The troublesome notion that should be consigned to the garbage is called "separability." It is the idea that if we know everything about one particle in one location and everything about another particle in a second location then we know everything about their combined system.

UNTANGLING ENTANGLEMENTCould a new philosophy shed light on photon experiments?Credit: IQOQI, University of Vienna

Separability is something we take for granted in every day life, and that may be why it is so embedded in our minds. But in quantum mechanics, the whole is much more than the sum of its parts, explains Myrvold. "If you take quantum mechanics seriously, it’s separability that you have to give up," he says. "When particle A and particle B are in an entangled state then telling you everything there is to say about particle A and telling you everything there is to say about particle B doesn’t tell you everything there is to say about the combined state about the particle A plus particle B system."

If you can free yourself from assuming separability, Myrvold argues, then when you observe one part of an entangled system, you will not be fooled into thinking of it as a separate object and become sidetracked worrying about how it can influence other separate objects. Myrvold believes that this misunderstanding leads us to falsely associate a single reference point in time with that part of the system, skewing our perception of what can happen to the rest of the system and when.

With an FQXi grant of over $56,000, Myrvold will be working out just how to weave non-separability into quantum mechanics explicitly, so that its not longer perceived as a strange and mysterious byproduct of the theory, but as a central—normal—feature. In addition to preparing a series of papers, he plans to work with other experts, both in philosophy and physics, at various workshops.

If you take quantum mechanicsseriously, it’s separability thatyou have to give up.

- Wayne Myrvold

Tim Maudlin, a philosopher at New York University, says that Myrvold is one of the few people who appreciate the subtle implications of entanglement with its correlations between objects separated by long distances. However, he does not think that focusing on non-separability will be enough to create a local theory—one that does not seem to violate the speed of light—that also fits with quantum observations.

"If you believe that those correlations are correctly predicted by quantum mechanics then you are stuck with non-locality," says Maudlin. "The deal is not about how do I get around it, but how do I deal with it and work it into my physics in a clearer way."

Bedingham, who last year won FQXi’s Most Courageous Postdoc prize, has his own strategy for bringing quantum mechanics into line with relativity. In this model, the two entangled particles are on two unique, but interacting, hyperspaces. When one particle is observed, its wavefunction collapses sending out a ripple in that hyperspace. The second particle’s properties change when that ripple effect is felt on the adjacent hyperspace. (Read our Q&A with Daniel Bedingham for more details.)

At present, it is difficult to think of a test that could discriminate between theories of wavefunction collapse. Myrvold notes that arguments about these issues date back to the birth of quantum mechanics, with little resolution. "It might look like people are just going around in circles and getting nowhere," he admits. "But even if we haven’t reached consensus, we have a much better appreciation for what the viable options are and how to think about them."

Comment on this Article

Please read the important Introduction that governs your
participation in this community. Inappropriate language will not be tolerated and posts containing such language will be deleted. Otherwise, this is a free speech Forum and all are welcome!

Please enter the text of your post, then click the "Submit New Post" button below. You may also optionally add file attachments below before submitting your edits.

HTML tags are not permitted in posts, and will automatically be stripped out. Links to other web sites are permitted. For instructions on how to add links, please read the link help page.

You may use superscript (10100) and subscript (A2) using [sup]...[/sup] and [sub]...[/sub] tags.

You may use bold (important) and italics (emphasize) using [b]...[/b] and [i]...[/i] tags.

LaTeX equations may be displayed in FQXi Forum posts by including them within [equation]...[/equation] tags. You may type your equation directly into your post, or use the LaTeX Equation Preview feature below to see how your equation will render (this is recommended).

You may optionally attach up to two documents to your post. To add an attachment, use the following feature to browse your computer and select the file to attach. The maximum file size for attachments is 1MB.

STEVE DUFOURNY wrote on April 2, 2016M Theory can be correlated with 3d Sphericalvolumes.The partitioning of rotating sphères more the fréquences and waves of spherical strings can be very relevant in fact.The dimensions are always in 3D ,that said we can correlate the computing with the 3D realism.The gravitation needs a real 3D cause.The rotations , motions and properties of sphères become a key.Gravitation appears when we have the correct serie of spherical volumes.The fermions bosons aren't sufficient.Our understanding of...

STEVE DUFOURNY wrote on April 2, 2016The Law of Demeter seems relevant for the categorification of objects.The sphericl volumes can help I am persuaded.It is like a key of security considering the principle of min.Knowledges.The categorifiations can be made with specific intrinsic independant laws.Of course the algorythms can be irmpoved for the sortings, superimposings and synchro ,it permits to evitate the wrappers and so it permits to have more place in hardware.The relevanceis with the spherical volumes permitting to evitate...

STEVE DUFOURNY wrote on April 1, 2016It is utilised in computer programming and it is considered like an error.I see that gluons are relevant.If it does not exist a mediator implying this action.So the error is difficult to analyse because we don't know the components and locality.I beleive that still the sphere and volumes can help to find these errors in progrmming.An algorythm can be created to detect and even prevent these errors due to these actions at a distance.Spherically yours from Belgium .